Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

dsu

Add tag

Problems

#	Name
1620A	Equal or Not Equal constructive algorithms, dsu, implementation	800	x21220
217A	Ice Skating brute force, dfs and similar, dsu, graphs	1200	x20388
1249B1	Books Exchange (easy version) dsu, math	1000	x20130
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x19278
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18314
1829E	The Lakes dfs and similar, dsu, graphs, implementation	1100	x18251
277A	Learning Languages dfs and similar, dsu	1400	x18123
1167C	News Distribution dfs and similar, dsu, graphs	1400	x17076
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x16258
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x16172
1332C	K-Complete Word dfs and similar, dsu, greedy, implementation, strings	1500	x15684
501B	Misha and Changing Handles data structures, dsu, strings	1100	x15628
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x15593
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x14647
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14378
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x13303
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x13245
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x12939
356A	Knight Tournament data structures, dsu	1500	x12794
600E	Lomsat gelral data structures, dfs and similar, dsu, trees	2300	x12694
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12500
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x12373
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12167
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x12120
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x12099
1726C	Jatayu's Balanced Bracket Sequence data structures, dsu, graphs, greedy	1300	x12079
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12074
1139C	Edgy Trees dfs and similar, dsu, graphs, math, trees	1500	x12040
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x11700
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x10483
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x10449
25D	Roads not only in Berland dsu, graphs, trees	1900	x10395
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x10333
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10238
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10130
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10122
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x9972
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9585
1670C	Where is the Pizza? data structures, dfs and similar, dsu, graphs, implementation, math	1400	x9522
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x9134
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x9096
722C	Destroying Array data structures, dsu	1600	x8855
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x8846
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x8823
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x8706
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8689
103B	Cthulhu dfs and similar, dsu, graphs	1500	x8534
1476D	Journey dfs and similar, dp, dsu, implementation	1700	x8394
1130C	Connect brute force, dfs and similar, dsu	1400	x8328
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x8230
1620E	Replace the Numbers constructive algorithms, data structures, dsu, implementation	1900	x7781
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x7773
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x7522
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7510
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7364
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7330
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7324
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x7138
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x7108
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x6982
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x6979
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x6958
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x6913
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6816
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6792
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x6628
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x6610
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6558
1131F	Asya And Kittens constructive algorithms, dsu	1700	x6394
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6232
490B	Queue dsu, implementation	1500	x5901
1095F	Make It Connected dsu, graphs, greedy	1900	x5855
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5815
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x5812
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x5774
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x5609
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x5558
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5551
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x5430
13E	Holes data structures, dsu	2700	x5383
371D	Vessels data structures, dsu, implementation, trees	1800	x5331
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5301
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5231
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5148
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5146
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5140
1009F	Dominant Indices data structures, dsu, trees	2300	x5117
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5099
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5053
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x5023
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x4951
1055B	Alice and Hairdresser dsu, implementation	1300	x4895
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x4834
1971G	XOUR data structures, dsu, sortings		x4818
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4668
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x4480
60B	Serial Time! dfs and similar, dsu	1400	x4445
28B	pSort dfs and similar, dsu, graphs	1600	x4413
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x4405
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4312

←